Pumping attachment for motor-vehicles.



J. O. JOHNSON.

PUMPING ATTACHMENT FOR MOTOR VEHTC'L'ES.- APPLICATION FILED Nov. 14.I917.

f 1,29 ,957, Patented Apr. 1,1919.

INVENTOR.

JOSEPH ODIN JOHNSON, 0F MENOMONIE, WISCONSIN.

PUMPING ATTACHMENT FOR MOTOR-VEHICLES.

Specification of Letters Patent.

Patented Apr. 1, 1919.

Application filed November 14, 1917. Serial No. 202,000.

0 all whom it may concern:

Be it known that I, JOSEPH ODIN JOHNSON, a citizen of the United States,residing at Menomonie, in the county of Dunn and State of lVisconsin,have invented certain new and useful Improvements in Pumping Attachmentsfor Motor-Vehicles, of which the following is a specification.

The present invention has for its object the provision of a mechanism ofsuch construction as to constitute a simple attachment for motor drivenvehicles by means of which the motive power of said vehicle is employedas the driving instrumentality. It will be apparent that such a devicemust possess as the essential characteristics ready adaptability todifferent vehicles, a minimum number of parts, ease of attachment andefficiency of action, all of which are typified in my invention which isspecifically described in the following specification and illustrated inthe accompanying drawing wherein:

*igure 1 is a vertical sectional view of the device; and

Fig.2 is an end elevation.

Referring to the drawing, 1 indicates the body casting of the pumpprovided at one side with the cylinder .2 in which the piston 3 ismounted and at the other side with a pressure chamber 4:. At the lowerend of the casting is the suction inlet 5 into which is screwed thenipple 6, the inner end of said nipple constituting a seat for the ballvalve 7 Just above the said valve is inserted into the cylinder castinga sto pin 8 limiting the movement of the valve rom its seat. The inletcommunicates by the passage 9 with the presssure chamber at through therestricted passage 10 controlled by the valve 11. This valve issimilarly restricted in movement by the stop pin 12. At one side the airchamber is provided with the outlet 13 and at the end the casting has aremovable plug 14 rendering the interior of the pressure chambera'cccessible for introduction of the ball valve 11.

At one end the casting is provided with a bearing 15 through whichextends the crank shaft 16 connected by the wrist pin 17 to the pistonrod 18. The said crank shaft is prefe'rably formed with a shoulder 19and the casting or body of the pump is held in place against thisshoulder by the cap 20 which is fixed to the shaft by the set screw 21.This Copies of this patent may be obtained for five cents each, byaddressing the ,mounted upon cap is suitably threaded as indicated at 22for attachment to the driving axle of a motor vehicle and it will beunderstood that the cap is designed to be interchangeable so that theproper connection may be made with vehicles of different sizes orconstructions. The cap, it will be apparent, has a triple function inthat it constitutes the connecting means for connecting the shaft to thepump, for connecting said shaft to the wheel, and lastly, the said capconstitutes a support for the pump. The casting is swingingly the crankshaft 16 and depends therefrom under normal conditions, suitable meansbeing applicable to hold the pump body in this position if desired, suchmeans being preferably connected to the apertured lug 23 at the base ofthe cylinder casting.

A pump of this character may be utilized as a water pump for washing thevehicle, in which event a suction tube is applied to the nipple 6 and-asuitable hose connected with the discharge outlet 13. The pumpmechanism, however, may be utilized for pumping air and when it is to beused for these purposes a rear wheel of the vehicle is jacked up andafter first removing the usual hub cap the connecting cap 20 is screwedin place. The set screw 21 is-then adjusted so as to fix the shaft forrotation with the cap when the motor vehicle is operated.

A very simple, compact and useful article is provided by the mechanismhereinbefore disclosed and one which may easily form an inexpensive partof the equipment of the said vehicle.

Having thus described my invention, what I claim as new is:

A pumping attachment for motor driven vehicles adapted for connectionwith the driving axle thereof, comprising a body having a cylinder atone side, a piston mounted therein and a pressure chamber at the otherside, said body having inlet and discharge ports, a crank shaft on whichthe body is swingingly supported and connected to the piston, aconnecting member threaded at one side for connection with the vehicleaxle and engageable with the crank shaft at its other side, and meansfor fixing the crank shaft to the connecting member for actuationthereby.

In testimtcTmy whereof I affix my signature.

OSEPH ODIN JOHNSON.

"commissioner of ratontl,

Washington, .D. 0.

